#ifndef _cgfxShaderCommon_h_
#define _cgfxShaderCommon_h_

#ifdef _WIN32
#  pragma warning(disable: 4786)
#endif

// This header file simply defines some things that I
// want to use throughout the plug-in
//


// If assertion is false, throw an InternalError exception.
// Note: A Maya MStatus object can be used as the assertion... true means success.
#define M_CHECK(assertion)  if (assertion) ; else throw ((cgfxShaderCommon::InternalError*)__LINE__)

#ifdef DEBUG
#define CGFX_DEBUG 1
#endif

namespace cgfxShaderCommon
{
#ifdef _WIN32
	class InternalError;    // Never defined.  Used like this:
	//   throw (InternalError*)__LINE__;
#else
	struct InternalError
	{
		char* message;
	};
	//   throw (InternalError*)__LINE__;
#endif
}


#define RETURNSTAT(s, msg)	\
	if (!s)					\
{						\
	s.perror(msg);		\
	return s;			\
}


#define lengthof(array) (sizeof(array) / sizeof(array[0]))

#if !defined(TEXTURES_BY_NAME) && !defined(TEXTURES_BY_NODE)
#  define TEXTURES_BY_NODE 1
#endif

#if defined(CGFX_DEBUG) && defined(_WIN32)
#  ifndef _CRTDBG_MAP_ALLOC
#    define _CRTDBG_MAP_ALLOC
#  endif
#endif /* CGFX_DEBUG && _WIN32 */


#include <stdlib.h>

#if defined(_WIN32)
// We must include <stdlib.h> before <crtdbg.h> or we get
// errors about overloading calloc.
//
#  include <crtdbg.h>
#endif /* _WIN32 */

#if defined(CGFX_DEBUG2)
#  define OutputDebugString(s)			fprintf(stderr, "%s", s)
#  define OutputDebugStrings(s1, s2)	fprintf(stderr, "%s%s\n", s1, s2);
#else
#  if defined (_WIN32)
// In optimized mode, send the string to the debugger
#     define OutputDebugStrings(s1, s2) \
	(OutputDebugString(s1), OutputDebugString(s2), OutputDebugString("\n"))
#  else
#    define OutputDebugString(s)		((void) 0)
#    define OutputDebugStrings(s1, s2)	((void) 0)
#  endif
#endif /* CGFX_DEBUG */

// Return true if item is found in Maya array.
template < typename Tarray, typename Titem >
bool
arrayContains( const Tarray& array, const Titem& item )
{
	int i;
	for ( i = array.length(); i > 0; --i )
		if ( array[ i - 1 ] == item )
			break;
	return i > 0;
}


// Append item to Maya array if not already present.
// Returns index of the new or existing array element.
template < typename Tarray, typename Titem >
int
findOrAppend( Tarray& array, const Titem& item )
{
	int i;
	int n = array.length();
	for ( i = 0; i < n; ++i )
		if ( array[ i ] == item )
			break;
	if ( i == n )
		array.append( item );
	return i;
}


#endif /* _cgfxShaderCommon_h */